code style inspection: to -> Pair function used not in infix form

idea/testData/inspectionsLocal/replaceToWithInfixForm/.inspection

@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.inspections.ReplaceToWithInfixFormInspection

idea/testData/inspectionsLocal/replaceToWithInfixForm/base.kt

@@ -0,0 +1,7 @@
+// WITH_RUNTIME
+class A
+class B
+
+fun foo(a: A, b: B) {
+    val pair = a.<caret>to(b)
+}

idea/testData/inspectionsLocal/replaceToWithInfixForm/base.kt.after

@@ -0,0 +1,7 @@
+// WITH_RUNTIME
+class A
+class B
+
+fun foo(a: A, b: B) {
+    val pair = a to b
+}

idea/testData/inspectionsLocal/replaceToWithInfixForm/nonPair.kt

@@ -0,0 +1,9 @@
+// PROBLEM: none
+class A {
+    fun to(x: Int) {
+    }
+}
+
+fun foo() {
+    A().<caret>to(1)
+}